Mine hoist



July 7, 1925. i 1,544,758

F. E. HULETT ET AL MINE HOIST Filed Oct. l5. 1920 7 Sheets-Sheet 1 mundial:

July 7, 1925.

` F. E, HULETT ET AL MINE HOIST Filed oct. 15, 1920 7 Sheets-Sheet 2 t; avez-fats oCu, 1751' "Jig/:57

July 7, 1925. 1,544,158

F. E. HULETT ET=AL MINE HoIsT 'g/En/:JE

E MTM gg/575 July 7, 1925. 1,544,758

F. E. HUI-ETT ET AL I MINE HoIsT Filed Oct. 15, 1920 7 Sheets-Sheet 4 za l 7 July 7, 1925 F. E. HULETT ET AL MINE HOIS'I' Filed 0st. 15, 1920 '7 Sheets-Sheet 5 July 7, 1925. 1,544,758

F. E. HULETT ET AL MINE HOIST Filed Oct. 15, 1920 7 Sheets-Sheet 6 July 7, 1925.. y 1,544,758

FF E UULETT ET AL MINE HOIST Filed OCI.. l5. .1 Sheets-Sheet 7 'E mi Ad( Y- fys Patente'dJuly 7, 1925.

FRANK n. HULn'rn-oroiinvELAN-i AND-Lair min-ori YoUNGsToWN, oiiio.

MINE yHeier;

vApplication filed Qctobei A1-'5, 1920'.v Sieifi'aiy No. 417,115j

To @ZZ/whom t may concern:

Be it known that we, FRANK- residing at Cleveland, Cuyahoga County, Ohio, and Youngstown, Mahoning County, Ohio, respectively, have invented certain new and useful Improvements in Mine Hoists, of which `the following isv aspeci.-

iication. i

This invention relates to .improvements in hoisting and conveying apparatus, and more particularly to hoisting mechanism for elevating coal andv other deposits, from mines.

Heretofore it has been customary Vin mine hoists to employ a vskipor .bucketof smallI capacity, for example twelve to fifteen tons, and to run theI apparatus at high speed so as to produceutonnage rapidffill-ing, ele

vating, discharging and lowering opera-v tions. This is? undesirable by reasoii'ot ythe rapid loading and] dumping. asV well as the high speed of theapparatus, and such operation results in much loss of time `due te frequent periods of stopping. andiV starting. the apparatus. YThe expense of operation` according tofthe old niethodis also excessive dueto power consumption, cost of maintenance, etc.

The present invention is intended to overcome the'dificulties and disadvantages arising out of the former practice by the employment of av skip or bucketof large ca` pacity', as for instance fifty tons, whereby the apparatus may be operatedv at a most desirable speed and yetla great tonnage will,l It is in the attaining of this end result. that the present improvements havebeen devised, suoli improvements 'being the arrange-v ment ot the counter-weights whereby a poitionA ofA the counter-weight controls the door; the Yentire counter-weight assists in? elevating` the load; the load upon the Vhoist'- ing mechanism during raising and lowering operations is equalizedv by the suitable arrangement of counterweights; -andl whereby other advantageous results are obtained due" to features ofV construction and arrangement as will appear.

Y The invention may nation of parts set' forth in description7 drawings andclaims.

Referring iirstV to .the drawings, Fig.` I is a view in elevation showing; the apparatus;

E. Hi-mirra and. Lnir Lnn, citizens of the UnitedStates,

Ving portions together; Figa-is'asectional VView through thev mine shaft; Fig. `5 is an I i be brieiiy summarized: as consisting. inthe construction and combithe following F ig. l2 is aY side elevation of the counterweights; F 1g, 3 is a detailV view of the counteiweights showing the manner ,of connectend view .of the skip or bucketi Fig. isa front view of the vskip or bucket with the door closed; Fig. 7 isa lView similar to- Fig.

l5 showing the arrangement of the cables chute?) is adapted to convey the coal or other i deposit to the mine shaft l. Above the mine shaft is a superstructure comprising a frame worl'r', supportingL suitable guide rail's and 'lump bins 7and8. vThis superstructureY also supportsa suitable head frame 9. 4ExF tending upward fromthe bottom ot the shaft 1and .also upward throughr thef'superstructure are suitable opposed rails lIO and ll for the door counterweight,r as will Vappear,l andl another pair ofrails 12. and' v13 for the main counterweiglit. These' rails" are supported on brackets 14 securedto suitable beams 14a arranged jin the s'haf-t andv in the superstructure. rSlid'a'bly mounted on? the rails 'isY a skip or 'bucket which comprisesl rectangular shaped casing I5 having an inclined bottom 1G extending from one side towardrthe lower edge ofthe opposite side. VheelsG ony the slip` engage the rails-6. Adjacenty to the lower'edgeof' one s'i'de ai suitable dump opening adapted to be clesed by a door 17 hinged at 18 and' extending froin one side oftheskipor.bucket to the other.. This door when open seives'as af chute. Attached to eacliend' off this door are suitable chains 1'9 which pass'between guide rollers 20 and 21 and up intoguide. channels 22, one being attached to' each end' of" the door. a Secured-A tothe lends of the chain are suitable. clipsQB which; are at'- tached to turn-buckles 24, in turn connected to cable ends on the ends of door cables4 26. The right hand-door cable 26, as shown in Fig. 8, passes over a sheave 27 suitably supported in the head frame 9 and thence over a double groove sheave 28. The other door cable 26 passes over a roller 29 and thence in the `other groove of the double groove sheave 28. Both of these cables 26 pass down and are connected to suitable bolts 30 adjustably mounted in the cross member 31' which is secured to suitable door weight bolts 32 passing down through the main door weight portions 33. These main door weight portions have notchesV 34 in their ends adapted for engagement with the rails 10 and 11. Secured to the main door weight/portions 33 by means of bolts 33a are the auxiliary portions 35 which are likewise provided with recesses similar to those indicated at 34, and these recesses like-'- wise receive the rails 10 and 11. The arrangement of the weight in two sections, as described, provides ready means for applying the weights to the rails. This weight is sufficient to hold the door closed against the weight of the coal in the skip as it presses against the same. lt will be seen from the foregoing that the door weights lwill be suspended from the door and will tend to hold the door closed, but if the door weights were arrested in their downward movement, then the door would tend to open; and to produce this action a suitable yielding platform or bumper 36 is provided at the bottom of the shaft 1.

Secured to .each end of the skip or bucket f is a pair of counterweight cables 37 and 38 which pass over double groove sheaves 89 and 40 respectively, and thence around the suitable drums 41 and 42 respectively, to which the ends of these cables are secured for winding. These drums 41 and 42 are supported in a suitable frame 43 located in a power house 44. These drums 41 and 42 are driven by pinions 45 and 46 respectively, and these pinions are supported and driven by a shaft 46, carrying a gear 47 driven by a pinion 48 operated by a suitable motor 49. The shaft 50 of this motor is provided with suitable braking mechanism consisting of the shoes 51 and 52 pivoted at 53 and 54 rerespectively, and suitably connected to a weighted lever 55. This lever 55 is actuated by a rod 56, connected to a lever 57, one end of which lever is connected to a solenoid core 58, co-operating with a solenoid coil 59. This solenoid is actuated in series with motor by proper electric connections. Shaft 46 is also driven by a second gear which meshes with a pinion 6l driven by a motor 62. The shaft of this motor is also provided with a brake similar to that already described. Shaft 46 is further provided with a pinion 63, meshing with a gear 64, secured to a main counter-weight drum to which are attached the ends of a pair of cables 66 for winding thereon. These cables pass overa double groove sheave 67, supported in a head frame and thence pass down and are secured to a main counterweight cross member 68, connected to main counter-weight bolts 69 which pass through the main counter-weight portions 70. These main counter-weight portions are similar to but larger than the door counter-weight portions 33. Secured to these main counterweight portions 70 are auxiliary portions 71. This main counter-weight engages the rails 12 and 13. The portions 70 and 71 constitute a sectional counterweight. The ,arrangement of cables on the drums 41, 42 and 65 is such that when the skip or bucket ropes are being wound the main counterweight cables are being unwound, and vice versa. The skip and door counterweights together constitute a divided counterweight.

From the foregoing it will be seenV that when the skip or bucket descends in empty condition its door will be closed as soon as the doorl counterweight is cut in so as to be effective and the motors driving the drums will elevate the main counterweight, the weight of the skip or bucket being sufficient to elevate the door Vcounter-weight. lVhen the skip reaches the bottom of the shaft it is loaded and then elevated until the door counterweights are arrested by the yielding platform, when the skip or bucket will move upward permitting the door to open and discharge its load into the lump bin. During the elevating operation the motors driving the drums are raising a load corresponding to the load upon the motors when lowering the skip or bucket, in that the excess of the load over the counterweights is substantially equal Y to the excess of the counter-weights over the empty skip. It is true that part ofthe counterweight is relieved or cut out9 when the skip or bucket reaches its uppermost position, but that has the advantage of merely slowing up the skip or bucket at the upper end of its travel, which makes it possible to work under closer head room clearances. The lowering speed of the empty skip is greater at the start, that is until the door is closed; which assists in overcoming the inertia of the counterweights. By having the door of the skip serve as a chute, it is not necessary to overturn the skip in dumping the same and consequently less head room is required. The use of a large and wide skip makes possible a simplifying of the loading tipple at the bottom as well as the lump bin at the top. The form of skip also facilitates the loading of the same. Furthermore, my invention effects a reduction in power consumption, reduces the speed of hoisting and lowering, allows more time for loading and unloading, and reduces t-he cost of up-keep. The danger of accident is also lessened by using my invention,

Sill

lul)

Other advantages will be apparent tov therefor, part of the counterweight beingv operatively connected to said discharge means, means for raising the skip and lowering the counterweight, and vice versa, and meansd for automatically controllingsaid counterweight and thereby control the discharge of said skip.

2. In a mine hoist having a discharge means, a skip, a divided connteiweight therefor, part of said counterweight being operatively connected to said discharge means, means for raising the skip and lowering the counterweight, and vice versa, and means for automatically controlling said counterweight and thereby discharge said skip at a predetermined point in its travel.

3. In a mine hoist, a skip having a door, a divided counterweight therefor, part of the counterweight beingV operatively connected to the door of the skip, means forV raising the skip and lowering the counterweight, and vice versa, and means for automatically controlling said counterweight and thereby control the operation of the door of the skip. Y

4. In a mine hoist, a skip having a door adapted when open to serve as a. chute, a divided counterweight therefor, part of the counterweight being operatively connected with said door, means for raising the skip and lowering the counterweight, and vice versa, and means for automatically controlling said counterweight and thereby control the operation of the door of the skip at a predetermined point in its travel.

5. In a mine hoist, a skip having a door, a divided oounterweight therefor, part of the counterweight being operatively connected to the door of the skip, means for raising the skip and lowering the counterweight, and vice versa, and means for automatically controlling said counterweight and thereby discharge said skip at a predetermined point in its travel.

6. In a mine hoist, a skip, a door for said skip, a counterweight for the skip, a counterweight for the door, means for raising the skip and lowering the counterweights, and vice versa, and means for automatically relieving the door of its counterweight at a predetermined point in the upward travel of the skip to open the door.

7 In a mine hoist, a skip, a door for said skip, a counterweight for the skip, a counterweight for the door, means for raising the skip and lowering the counterweights, and vice versa, said door being held closed by the door counterweight against the weight of the contents of the skip, and means for automatically relieving the door of its counterweight at a predetermined point in the upward travel of the skip to open the door.

8. In a mine hoist, a skip, a door for said skip, a counterweight for the skip, a counterweight for the door, means for raising the skip and lowering the counterweight, and vice versa, and means for automatically relieving the door of its counterweiglit at apredetermined point in the upward travel of the skip to open the door, the weight of the empty vskip being greatery than that of the door counterweight.

9. In a mine hoist,a skip, adoor for said skip,.a counterweight for the skip, a counterweight forl the door, means for raising the skip and lowering the counterweights, and vice versa, the parts being so constructed and yarranged that the power required for raising the loaded skip and lowering the empty skip is approximately the same.

10. In a mine hoist, a skip, a door for Y said skip, a counterweight for the skip, a counterweight for the door, means for raising the skip and lowering the skip counterweight, and vice versa, and a separate operative connection between the door and its counterweight.

1l. Ina mine hoist, a skip, a sectional counterweight therefor, guide means for said counterweight, said guide means engaging said counterweight along the lines of division between its sections, and means for raising the skip and lowering the counterweight, and vice versa.

In testimony whereof we hereby affix our signatures. l

FRANK E. I-IULETT. LEIF LEE. 

